Astron. Astrophys. 328, 211-218 (1997)

5. Summary

The ALRW91 carbon stars are likely not located in the Bulge, but are related to the SDG.
The ALRW91 carbon stars are not metal-rich.
The metallicity is about Z = 0.008 with an age between 0.1 - 1 Gyr.
A significant number of the ALRW91 carbon stars are located below the tip of the red giant branch.
The origin of the carbon stars one magnitude below the red giant branch tip cannot be explained with the evolution of a TP-AGB star.
The faint carbon stars likely originated through mass transfer from binary evolution.

© European Southern Observatory (ESO) 1997

Online publication: March 24, 1998

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